I hate leaving negative reviews; especially becaus...

I hate leaving negative reviews; especially because I guess I'm partially at fault for my own stupidity because I didn't catch my mistake until my 4 hour drive home. The truck was priced right, the trade-in value of my truck was acceptable, so I was ready to sign and get out of there after a VERY long day. While I was signing the docs, the nice gentleman in the finance dept. told me "even though you wanted to finance for 48-60 months, I found you a better deal on 75 months" and that "I've gone ahead and added some service packages that you will need". Not doing the math, I thought he was just being really nice and I signed everything with a smile. On the way home it hit me...."$34k for the truck, $18k trade-in and $2k down......and he said monthly payments are $313.27 for.......75 Months! So my $14k loan somehow turned into over $23k". No possible way interest would be that much. What happened?! Those added services that I would "need" totaled up to about $6k. Never again. Hopefully I help someone ask details and prices about these "services that you need" before you sign.